pkg/60480: Multiple packages fail install with pkgin on NetBSD 11.0 RC6

>Number:         60480
>Category:       pkg
>Synopsis:       Multiple packages fail install with pkgin on NetBSD 11.0 RC6
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jul 22 21:50:00 +0000 2026
>Originator:     Parade du Grotesque
>Release:        NetBSD 11.0 RC6 + pkg 2026Q2
>Organization:
N/A
>Environment:
NetBSD ideapad.xxxxx.org 11.0_RC6 NetBSD 11.0_RC6 (GENERIC) #0: Tue Jul  7 15:10:39 UTC 2026  [email protected]:/usr/src/sys/arch/amd64/compile/GENERIC amd64

>Description:
Multiple failures attempting to install packages through pkgin.
Stock configuration, no changes made to either NetBSD, pkgin or pkgsrc configuration.

For example:

Trying to install emacs, multiple packages are marked as 'not found' or 'unavailable' and pkgin stops the installation and asks "Proceed [y/N]" before failing the installation with $? returning '1'.

Restarting the installation may or may not solve the problem.
>How-To-Repeat:
Try installing the same package (emacs for example) several times.

It will usually fail on the same dependencies.
>Fix:
Sometimes, trying several times result in a succesful installation.

It is clear to me the problem is located on the mirror used by pkgin and not on the local machine.